mirror of
https://github.com/GoogleContainerTools/kaniko
synced 2026-10-19 02:54:26 +02:00
Priya Wadhwa
7080a8dd69
I changed UnpackLocalTarArchive to return a list of files that were extracted, so that the list of snapshotted files for ADD is more accurate. Previously, we used to add all files in the extracted dir to be snapshotted, but this could result in preexisting files being snapshotted again.
119 lines
3.9 KiB
Go
119 lines
3.9 KiB
Go
/*
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Copyright 2018 Google LLC
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package commands
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import (
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"path/filepath"
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"strings"
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"github.com/GoogleContainerTools/kaniko/pkg/dockerfile"
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"github.com/google/go-containerregistry/pkg/v1"
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"github.com/GoogleContainerTools/kaniko/pkg/util"
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"github.com/moby/buildkit/frontend/dockerfile/instructions"
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"github.com/sirupsen/logrus"
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)
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type AddCommand struct {
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cmd *instructions.AddCommand
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buildcontext string
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snapshotFiles []string
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}
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// ExecuteCommand executes the ADD command
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// Special stuff about ADD:
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// 1. If <src> is a remote file URL:
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// - destination will have permissions of 0600
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// - If remote file has HTTP Last-Modified header, we set the mtime of the file to that timestamp
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// - If dest doesn't end with a slash, the filepath is inferred to be <dest>/<filename>
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// 2. If <src> is a local tar archive:
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// -If <src> is a local tar archive, it is unpacked at the dest, as 'tar -x' would
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func (a *AddCommand) ExecuteCommand(config *v1.Config, buildArgs *dockerfile.BuildArgs) error {
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srcs := a.cmd.SourcesAndDest[:len(a.cmd.SourcesAndDest)-1]
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dest := a.cmd.SourcesAndDest[len(a.cmd.SourcesAndDest)-1]
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logrus.Infof("cmd: Add %s", srcs)
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logrus.Infof("dest: %s", dest)
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// First, resolve any environment replacement
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replacementEnvs := buildArgs.ReplacementEnvs(config.Env)
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resolvedEnvs, err := util.ResolveEnvironmentReplacementList(a.cmd.SourcesAndDest, replacementEnvs, true)
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if err != nil {
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return err
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}
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dest = resolvedEnvs[len(resolvedEnvs)-1]
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// Resolve wildcards and get a list of resolved sources
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srcs, err = util.ResolveSources(resolvedEnvs, a.buildcontext)
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if err != nil {
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return err
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}
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var unresolvedSrcs []string
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// If any of the sources are local tar archives:
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// 1. Unpack them to the specified destination
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// If any of the sources is a remote file URL:
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// 1. Download and copy it to the specified dest
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// Else, add to the list of unresolved sources
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for _, src := range srcs {
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fullPath := filepath.Join(a.buildcontext, src)
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if util.IsSrcRemoteFileURL(src) {
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urlDest := util.URLDestinationFilepath(src, dest, config.WorkingDir)
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logrus.Infof("Adding remote URL %s to %s", src, urlDest)
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if err := util.DownloadFileToDest(src, urlDest); err != nil {
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return err
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}
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a.snapshotFiles = append(a.snapshotFiles, urlDest)
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} else if util.IsFileLocalTarArchive(fullPath) {
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logrus.Infof("Unpacking local tar archive %s to %s", src, dest)
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extractedFiles, err := util.UnpackLocalTarArchive(fullPath, dest)
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if err != nil {
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return err
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}
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logrus.Debugf("Added %v from local tar archive %s", extractedFiles, src)
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a.snapshotFiles = append(a.snapshotFiles, extractedFiles...)
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} else {
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unresolvedSrcs = append(unresolvedSrcs, src)
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}
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}
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// With the remaining "normal" sources, create and execute a standard copy command
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if len(unresolvedSrcs) == 0 {
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return nil
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}
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copyCmd := CopyCommand{
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cmd: &instructions.CopyCommand{
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SourcesAndDest: append(unresolvedSrcs, dest),
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},
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buildcontext: a.buildcontext,
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}
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if err := copyCmd.ExecuteCommand(config, buildArgs); err != nil {
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return err
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}
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a.snapshotFiles = append(a.snapshotFiles, copyCmd.snapshotFiles...)
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return nil
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}
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// FilesToSnapshot should return an empty array if still nil; no files were changed
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func (a *AddCommand) FilesToSnapshot() []string {
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return a.snapshotFiles
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}
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// CreatedBy returns some information about the command for the image config
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func (a *AddCommand) CreatedBy() string {
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return strings.Join(a.cmd.SourcesAndDest, " ")
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}
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